ATLANTA — Four generators that power emergency systems at nuclear plants have failed when needed since April, an unusual cluster that has attracted the attention of federal inspectors and could prompt the industry to re-examine its maintenance plans.

None of these failures has threatened the public. But the diesel generators serve the crucial function of supplying electricity to cooling systems that prevent a nuclear plant’s hot, radioactive fuel from overheating, melting and potentially releasing radiation into the environment. That worst-case scenario happened this year when the Fukushima Dai-ichi nuclear plant in Japan lost all backup power for its cooling systems after an earthquake and tsunami.

Three diesel generators failed after tornadoes ripped across Alabama and knocked out electric lines serving the Tennessee Valley Authority’s Browns Ferry nuclear plant in April. Two failed because of mechanical problems and one was unavailable because of planned maintenance.

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The Atomic Age is an ongoing project that aims to cultivate critical and reflective intervention regarding nuclear power and weapons. We provide daily news updates on the issues of nuclear energy and weapons, primarily though not exclusively in English and Japanese via RSS, Twitter, and Facebook. If you would like to receive updates in English only, subscribe to this RSS.

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The artwork in the header, titled "JAPAN:Nuclear Power Plant," is copyright artist Tomiyama Taeko.

The photograph in the sidebar, of a nuclear power plant in Byron, Illinois, is copyright photographer Joseph Pobereskin (http://pobereskin.com/)

This website was designed by the Center for East Asian Studies, the University of Chicago, and is administered by Masaki Matsumoto, Graduate Student in the Masters of Arts Program for the Social Sciences, the University of Chicago.

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If you have any questions, please contact the Center for East Asian Studies, the University of Chicago at 773-702-2715 or japanatchicago@uchicago.edu.